package test;

import java.util.Scanner;

public class Main0601 {
	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		String str1=null;
		int[] arr=new int[5];
		while(in.hasNext()){
			String str=in.next();
			try{
				if(str.equals("arr")){
					int index=in.nextInt();
					arr[index]=1;
				}
				else if(str.equals("null")){
					str1.length();
				}
				else if(str.equals("cast")){
					Object o=new String("str");
					Integer integer=(Integer)o;
				}
				else if(str.equals("num")){
					String Num=in.next();
					Integer.parseInt(Num);
				}
			}catch(Exception e){
					System.out.println(e);
			}
		}
			
	}
}
